While the bottle cap is removed by a standard wall-mounted opener, the fun starts when the cap falls through a wooden labyrinth of various mechanisms reminiscent of a Rube Goldberg machine.

By folding a standard piece of printer paper in half ... But, for some reason, the bottle opener is nowhere to be found.

The OHBO – the One Hand Bottle Opener – is just a simple 3D printed ring that fits over a water bottle. There’s a small arm attached with a few bolts that lock this ring onto the bottle.

The crisis? You want to enjoy a beer, but you have no bottle opener. Don’t panic, because we’re going to get through this ...